Android: Intelligent Ringer is a free utility for Android that listens to the ambient noise level in the room around you, and sets your phone's ringer accordingly so you never scare everyone around you with a loud ringtone in a quiet room, or miss a call because the ringer is accidentally set too low and you can't hear it over the noise around you.

Intelligent Ringer is perfect for those situations where you put your phone on silent or vibrate during a meeting, then miss a call later because you forgot to turn the ringer back on (like I have several times), or for that coworker who just refuses to turn their ringer down while they're working at their desk. The app is intelligent enough to use the proximity sensor to know if the phone is in your pocket, and if you want more control over the app, you can adjust its sensitivity and minimum volume to your own preferences.

If the app sounds a bit familiar, it should—we covered another similar app last year called RingDimmer which does the same thing, but RingDimmer hasn't been updated in a while (and costs $1, while Intelligent Ringer is free). If Intelligent Ringer doesn't work for you, check out RingDimmer. Grab Intelligent Ringer from Google Play at the link below.